A bug in get_iplayer-3.01?

[RS]

>Sent: Saturday, June 3, 2017 14:26  Iwrote

>In Windows / is replaced with _.  In Linux it is not.  If the justification 
>for removing --fatfilename was that Linux was to treated in the same way as 
>Windows it seems to me you are right to call it a bug.

>I have now found where --fatfilename was removed.  It was in v2.98.  The 
>Release Notes say,

>File name sanitisation options (replaced by uniform naming scheme)

>   All file names are now always ASCII-only, with most punctuation removed.
>   All dates in episode titles are now always converted to YYYY-MM-DD 
> format for use in file names

The relevant code in v3.01 would seem to be
<code>
# Generic
# Make a filename/path sane
sub StringUtils::sanitize_path {
    my $string = shift;
    my $is_path = shift || 0;
    my $force_default = shift || 0;
    my $punct_bad = '[!"#$%&\'()*+,:;<=>?@[\]^`{|}~]';
    # Replace forward slashes with _ if not path
    $string =~ s/\//_/g unless $is_path;
    # Replace backslashes with _ if not Windows path
    $string =~ s/\\/_/g unless $^O eq "MSWin32" && $is_path;
    # use ISO8601 dates
    $string =~ s|(\d\d)[/_](\d\d)[/_](20\d\d)|$3-$2-$1|g;
    # ASCII-fy some punctuation
    $string = StringUtils::convert_punctuation($string);
    # Remove non-ASCII chars
    $string = StringUtils::remove_marks($string);
    $string =~ s/[^\x{20}-\x{7e}]//g;
    # Truncate duplicate colon/semi-colon/comma
    $string =~ s/([:;,])(\1)+/$1/g;
    # Add whitespace behind colon/semi-colon/comma if not present
    $string =~ s/([:;,])(\S)/$1 $2/g;
    # Remove most punctuation chars
    # Includes invalid chars for FAT and HFS
    $string =~ s/$punct_bad//g;
    # Replace ellipsis
    $string =~ s/\.{3}/_/g;
    # Remove extra/leading/trailing whitespace
    $string =~ s/\s+/ /g;
    $string =~ s/(^\s+|\s+$)//g;
    # Replace whitespace with _ unless --whitespace
    $string =~ s/\s/_/g unless ( $opt->{whitespace} && ! $force_default );
    # Truncate multiple replacement chars
    $string =~ s/_+/_/g;
    return $string;
</code>

The question would appear to be why $is_path is true in Linux but not in 
Windows.  I don't know enough Perl to be able to answer.